6440506474 has 32 divisors (see below), whose sum is σ = 10289172096. Its totient is φ = 3013071360.

The previous prime is 6440506459. The next prime is 6440506477. The reversal of 6440506474 is 4746050446.

It is not an unprimeable number, because it can be changed into a prime (6440506477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6246339 + ... + 6247369.

It is an arithmetic number, because the mean of its divisors is an integer number (321536628).

Almost surely, 2^6440506474 is an apocalyptic number.

6440506474 is a deficient number, since it is larger than the sum of its proper divisors (3848665622).

6440506474 is a wasteful number, since it uses less digits than its factorization.

6440506474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1950.

The product of its (nonzero) digits is 322560, while the sum is 40.

The square root of 6440506474 is about 80252.7661454731. The cubic root of 6440506474 is about 1860.5442653201.

The spelling of 6440506474 in words is "six billion, four hundred forty million, five hundred six thousand, four hundred seventy-four".